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-rw-r--r--MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c b/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c
index e3b2846c09..e818543d92 100644
--- a/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c
+++ b/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c
@@ -40,14 +40,14 @@ FillBuf (
//
// Left shift NumOfBits of bits in advance
//
- Sd->mBitBuf = (UINT32) (Sd->mBitBuf << NumOfBits);
+ Sd->mBitBuf = (UINT32) LShiftU64 (((UINT64)Sd->mBitBuf), NumOfBits);
//
// Copy data needed in bytes into mSbuBitBuf
//
while (NumOfBits > Sd->mBitCount) {
-
- Sd->mBitBuf |= (UINT32) (Sd->mSubBitBuf << (NumOfBits = (UINT16) (NumOfBits - Sd->mBitCount)));
+ NumOfBits = (UINT16) (NumOfBits - Sd->mBitCount);
+ Sd->mBitBuf |= (UINT32) LShiftU64 (((UINT64)Sd->mSubBitBuf), NumOfBits);
if (Sd->mCompSize > 0) {
//